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      6.14.&nbsp;GMP-5.1.1
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        Linux From Scratch - Version 7.3
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      <h3>
        Chapter&nbsp;6.&nbsp;Installing Basic System Software
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      <h1 class="sect1">
        <a id="ch-system-gmp" name="ch-system-gmp"></a>6.14. GMP-5.1.1
      </h1>
      <div class="package" lang="en" xml:lang="en">
        <p>
          The GMP package contains math libraries. These have useful
          functions for arbitrary precision arithmetic.
        </p>
        <div class="segmentedlist">
          <div class="seglistitem">
            <div class="seg">
              <strong class="segtitle">Approximate build time:</strong>
              <span class="segbody">1.2 SBU</span>
            </div>
            <div class="seg">
              <strong class="segtitle">Required disk space:</strong>
              <span class="segbody">50 MB</span>
            </div>
          </div>
        </div>
      </div>
      <div class="installation" lang="en" xml:lang="en">
        <h2 class="sect2">
          6.14.1. Installation of GMP
        </h2>
        <div class="admon note">
          <img alt="[Note]" src="../images/note.png" />
          <h3>
            Note
          </h3>
          <p>
            If you are building for 32-bit x86, but you have a CPU which is
            capable of running 64-bit code <span class=
            "emphasis"><em>and</em></span> you have specified <code class=
            "envar">CFLAGS</code> in the environment, the configure script
            will attempt to configure for 64-bits and fail. Avoid this by
            invoking the configure command below with
          </p>
          <pre class="userinput">
<kbd class="command"><em class=
"parameter"><code>ABI=32</code></em> ./configure ...</kbd>
</pre>
        </div>
        <p>
          Prepare GMP for compilation:
        </p>
        <pre class="userinput">
<kbd class="command">./configure --prefix=/usr --enable-cxx</kbd>
</pre>
        <div class="variablelist">
          <p class="title">
            <b>The meaning of the new configure options:</b>
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          <dl>
            <dt>
              <span class="term"><em class=
              "parameter"><code>--enable-cxx</code></em></span>
            </dt>
            <dd>
              <p>
                This parameter enables C++ support
              </p>
            </dd>
          </dl>
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        <p>
          Compile the package:
        </p>
        <pre class="userinput">
<kbd class="command">make</kbd>
</pre>
        <div class="admon important">
          <img alt="[Important]" src="../images/important.png" />
          <h3>
            Important
          </h3>
          <p>
            The test suite for GMP in this section is considered critical. Do
            not skip it under any circumstances.
          </p>
        </div>
        <p>
          Test the results:
        </p>
        <pre class="userinput">
<kbd class="command">make check 2&gt;&amp;1 | tee gmp-check-log</kbd>
</pre>
        <p>
          Ensure that all 184 tests in the test suite passed. Check the
          results by issuing the following command:
        </p>
        <pre class="userinput">
<kbd class=
"command">awk '/tests passed/{total+=$2} ; END{print total}' gmp-check-log</kbd>
</pre>
        <p>
          Install the package:
        </p>
        <pre class="userinput">
<kbd class="command">make install</kbd>
</pre>
        <p>
          If desired, install the documentation:
        </p>
        <pre class="userinput">
<kbd class="command">mkdir -v /usr/share/doc/gmp-5.1.1
cp    -v doc/{isa_abi_headache,configuration} doc/*.html \
         /usr/share/doc/gmp-5.1.1</kbd>
</pre>
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      <div class="content" lang="en" xml:lang="en">
        <h2 class="sect2">
          <a id="contents-gmp" name="contents-gmp"></a>6.14.2. Contents of
          GMP
        </h2>
        <div class="segmentedlist">
          <div class="seglistitem">
            <div class="seg">
              <strong class="segtitle">Installed Libraries:</strong>
              <span class="segbody">libgmp.{a,so}, libgmpxx.{a,so}, and
              libmp.{a,so}</span>
            </div>
            <div class="seg">
              <strong class="segtitle">Installed directory:</strong>
              <span class="segbody">/usr/share/doc/gmp-5.1.1</span>
            </div>
          </div>
        </div>
        <div class="variablelist">
          <h3>
            Short Descriptions
          </h3>
          <table border="0">
            <col align="left" valign="top" />
            <tbody>
              <tr>
                <td>
                  <p>
                    <a id="libgmp" name="libgmp"></a><span class=
                    "term"><code class="filename">libgmp</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Contains precision math functions.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libgmpxx" name="libgmpxx"></a><span class=
                    "term"><code class="filename">libgmpxx</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Contains C++ precision math functions.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libmp" name="libmp"></a><span class=
                    "term"><code class="filename">libmp</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Contains the Berkeley MP math functions.
                  </p>
                </td>
              </tr>
            </tbody>
          </table>
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